think i found the item you described, was unsure how to check to see if it was faulty though? however, give the two silver connectors a rub with a bit of wire wool and it fired up 1st time! been running now for about 5 hours so may have resolved it, so, Thank you very very much for your help and advise. (oh and my wife thanks you for her 1st HOT shower in 3 days ha ha) thanks once again.
Darren
May 2005